<body>
<div id="editor">
	<p>
		<input required type="checkbox">
		<input required="" type="radio">
		<input required="true" type="text">
		<textarea required="false"></textarea>
		<select required="test"></select>
	</p>
</div>

<script>
	CKEDITOR.replace( 'editor' );
</script>
</body>
